#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int Numberof1(int n) {
	int count = 0;
	for (int i = 0; i < 32; i++) {
		if (((n >> i) & 1) == 1) {
			count++;
		}

	}
	return count;

}
int main() {
	int n = 0;
	scanf("%d", &n);
	int ret = Numberof1(n);
	printf("%d\n",ret);
	return 0;
}
